Brookline Reservoir of the Cochituate AqueductBrookline Reservoir of the Cochituate Aqueduct

This property, in addition to the reservoir, includes the end gatehouse of the Cochituate Aqueduct, and an elaborately-decorated distribution gatehouse that includes one of the earliest known uses of wrought iron for staircases. Photo: John Phelan, CC BY 3.0, via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Brookline_Reservoir,_June_2010,_Brookline_MA.jpg)